I somewhat disagree with this. Yes, fine if you are doing composition - after all Jazz came about from musicians experimenting and 'feeling the music'. But when you're improvising - making it up as you go along - (especially in public) surely you need a strong chordal framework to use, or you'll end up playing something that sounds 'wrong'. IMO improvising needs an extremely strong basis in music theory. JMO though 
It really depends on your goals. If imitation of a style is a goal then studying existing music in
that style makes sense of course. But to achieve some level of originality you must deviate somehow. Nothing
new has any theory associated with it because it is new. My advice had to do with the process of striving
To find your own sounds. Writing about it here is almost futile. But it obviously isn't completely futile or
I would not have met Ted here and spent the last 12 years finding my own sounds.